<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>我也不知道这是啥结构</title>
    <style>
        /* 塌陷边框 */
        table {
            border-collapse: collapse;
        }
        /* 表格及单元格边框 */
        table,
        td {
            border: 1px solid #000;
        }
        /* 设置固定宽度，文字居中 */
        td {
            width: 25px;
            height: 25px;
            text-align: center;
        }
    </style>
</head>

<body>
    <table>
        <tbody>
            <tr>
                <td colspan="12">1</td>
                <td rowspan="12">2</td>
            </tr>
            <tr>
                <td rowspan="12">4</td>
                <td colspan="10">5</td>
                <td rowspan="10">6</td>
            </tr>
            <tr>
                <td rowspan="10">8</td>
                <td colspan="8">9</td>
                <td rowspan="8">10</td>
            </tr>
            <tr>
                <td rowspan="8">12</td>
                <td colspan="6">13</td>
                <td rowspan="6">14</td>
            </tr>
            <tr>
                <td rowspan="6">16</td>
                <td colspan="4">17</td>
                <td rowspan="4">18</td>
            </tr>
            <tr>
                <td rowspan="4">23</td>
                <td colspan="2">21</td>
                <td rowspan="2">22</td>
            </tr>
            <tr>
                <td rowspan="2">20</td>
                <td>24</td>
            </tr>
            <tr>
                <td colspan="2">23</td>
            </tr>
            <tr>
                <td colspan="4">19</td>
            </tr>
            <tr>
                <td colspan="6">15</td>
            </tr>
            <tr>
                <td colspan="8">11</td>
            </tr>
            <tr>
                <td colspan="10">7</td>
            </tr>
            <tr>
                <td colspan="12">3</td>
            </tr>
        </tbody>
    </table>
</body>

</html>